Dear Fakhr eddine Mecheri ,

Your DEM might be corrupted. Can you check with a higher resolution DEM?

Regards

Miyuru

Miyuru is saying right.

Or try to use UTM projection

Fakhr eddine Mecheri ,

You can check with a finer resolution DEM also, ASTER, USGS offer 30m* 30m DEM. Global Mapper offers you 10m*10m DEM. You can check with their products.

Hope my answer will help you

Kind regards

Miyuru

Dear Miyuru Bandara Gunathilake , i tried a high resolution DEM and it worked.

Thanks for the help

Best regards

Dear Leelambar Singh , yes he is right, the DEM was corrupt.

thanks for the help i appreciate it.

Regards